Electrical water-heater.



No. 782,525. PATENTED FEB. 14, 1905. M. H. SHOENBEEG.

ELECTRICAL WATER HEATER.

APPLICATION FILED JUNE 30, 1904.

UNITED STATES Patented February 14:, 1905 PATENT OFFICE.

MILTON H. SHOENBERG, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO SHOENBERGELECTRIC APPLIANCE COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATIONOF CALIFORNIA.

ELECTRICAL WATER-HEATER.

SPECIFICATION forming part of Letters Patent N: 782,525, dated February14, 1905.

Application filed June 30, 1904. Serial No. 214,829.

To all whom it may concern:

Be it known that I, MILTON H. SI-IOENBERG, a citizen of the UnitedStates, residing in the city and county of San Francisco and State ofCalifornia, have invented new and useful Improvements in ElectricalVVater-Heaters, of which the following is a specification.

My invention relates to an apparatus which is designed for continuouslyheating a flowing stream of water.

It consists in the combination with an insulated heating-chamber havingsupply and discharge passages at opposite ends of an electricalconductor located within said chamber 5 and immersed in the liquid to beheated and in the combination and arrangement of mechanism, which willbe more fully explained by reference to the accompanying drawing, whichis a section through-my invention.

As shown in the drawing, A is a chamber of any suitable length anddiameter. This chamber is made of porcelain, hard rubber, or otherequivalent insulating material and has metal ends, as at 2. Supply anddischarge pipes 3 5 3 are connected, respectively, with the lower andupper ends of the cylinder or chamber A. The inlet-pipe 3 is connectedwith a supplypipe 4 by a pipe 5, made of insulating material. This pipemay be conveniently made of 3 flexible rubber. The discharge-pipe 3 hasa flange to which is bolted the flange of the conducting-pipe 6, andbetween these two flanges is secured an insulating-washer or equivalentdevice, as at 7. The apparatus thus constructed is entirely insulatedfrom short circuits, and

the conducting-wires 8 are connected by suitable binding-posts with themetal heads 2 of the chamber A. Between these metal heads a coil of anysuitable conducting-wire is ex- 4 tended, as shown at 9. This wirehaving a less resistance than that of the surrounding water, theelectrical current will pass through the wire between the heads 2 andcomplete the circuit through the wires 8 with any suitable source ofelectrical energy. The size of the coil 9 will be such that it willoffer sufficient resistance so that the passage of the current will heatthe wire sufliciently to impart heat to the water flowing through thechamber A.

In order to control the water-supply, I have shown a cock or faucet, asat 10, having a lever arm or handle 11 fixed to its outer end, and thishandle may have an extension at its opposite end, as shown at 11*.

The conducting-wires 8 of the apparatus and the source of electricalenergy are connected with a suitable switch, as at 12, which may beclosed to allow an electrical current to pass or opened to cut it ofl.The switch which I have here shown is of the form known as theknife-switch, in which the lever 12 is fulcrumed to one post to whichone of the conducting-wires is connected and is capable of makingcontact with another post, insulated from the first one and with whichthe other conducting-wire is connected. \Vhen the lever is thus closedto complete-the electrical circuit, the movable end of the lever standsin line with the fixedlever 0r handle 11 or its extension 11*, and underthese conditions the fancet must be opened when the switch is closed,and before the faucet can be closed the switch must be opened in orderto allow the handle or lever of the faucet to be turned to close thewater-supply. In this manner I insure the cutting off of the electricalcurrent before the water-supply can be cut off, and thus protect theconducting-wire from being destroyed by overheating.

It should be understood that the words wire coil or resistance-coil areintended to indicate any suitable conductor in which such resistance maybe opposed to the passage of an electrical current as will developsuflicient heat to raise the temperature of the water within which it islocated and that the form of the conductor may also be varied to suitrequirements or taste.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In an electrical water-heater, a casing formed of insulating materialand having supply and discharge pipes, a resistance-coil extendingthrough said casing, supply and dis charge pipes connecting With thechamber, and

1, connections whereby an electrical current is passed through saidcoil.

2. In an electrical water-heater, a casing composed of insulatingmaterial having metallic ends, supply and discharge pipes connectingwith said ends, means for insulating said pipes from the casing, anelectrical resistancecoil extending between the metallic heads of thecasing and into direct contact with which the fluid flows in its passagefrom the supplypipe to the discharge-pipe, and conducting- Wiresextending from the heads of the casing to a source of electrical energy.

3. In an electrical water-heater, an insulated chamber an electricalresistance-coil extending through said chamber conductingwires by whichan electric circuit may be established through said coil and acontrollingswitch therefor, insulated water-supply and discharge pipesconnecting with opposite ends of the chamber, a cook or faucet by whichthe water-supply is controlled, and a switch memher in the electriccircuit and movable into and out 01 the range of action of the faucetwhereby said laucet is prevented from closing while the electricalswitch is closed.

at. In an electrical water-heater an insulated ater-chamber withinsulated supply and discharge pipes, an electrical resistance-coilextending through the chamber in the direct path of the water,conducting-wires connected with the coil, a controlling-switch withwhich said wires connect, a cock to control the flow of water throughthe chamber, said cock having an operatinghandle provided with a stopwith which the switch is adapted to engage, a stop whereby the switchmust be opened before the water-cock can be closed.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

MlL"ON H. SHOENBERG.

\Vitnesses:

S. H. Nonnsn, EUGENE N. Levy.

